Nice choice, he should be happy with it if he liked his old Tundra. Keep in mind the 2013 has a different engine than the 2009. The 2009 was the old Toyota 4.7L with about 276 hp and a timing belt. The 2013 has a 3.6L with 310-hp and a timing chain. The 4.6L also seems to get better fuel mileage than the 4.7L.
http://en.wikipedia.org/wiki/Toyota_UZ_engine
http://en.wikipedia.org/wiki/Toyota_UR_engine
http://en.wikipedia.org/wiki/Toyota_UZ_engine
http://en.wikipedia.org/wiki/Toyota_UR_engine